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Chapter 4: Q 247 (page 458)

Evaluate each determinant by expanding by minors.

2-4-35-1-4320

Short Answer

Expert verified

The required value of the determinant is25

Step by step solution

01

Step 1. Given information

The determinant is2-4-35-1-4320

02

Step 2. Expand by minors along the third row to evaluate determinant

2-4-35-1-4320=3-4-3-1-4-22-35-4+02-45-1=3[(-4)(-4)-(-3)(-1)]-2[(2)(-4)-(-3)(5)]+0=3[13]-2[7]+0=39-14+0=25

03

Step 3. Required answer

The required value of the determinant is25

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Most popular questions from this chapter

Solve the system of equations by substitution

3x+4y=1y=-25x+2

A small jet can fly 1435miles in 5hours with a tailwind but only 1215miles in 5hours into a headwind. Find the speed of the jet in still air and the speed of the wind.

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The sum of two numbers is

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Find the numbers.

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y=32x+12x-3y=7
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